If we had a dollar for every time we heard a dermatologist suggest using a serum, we’d be happily retired on a Tahitian beach right about now (covered in SPF, of course). Seriously, in the—very, very—saturated beauty product world, serums remain one of the most important players. And while yes, they technically may not be a bare necessity in the way a cleanser or sunscreen is, they’re essential if you want to incorporate a lot of skin-care ingredients into your complexion (and quick!).
“Serums are unique in that they’re highly concentrated, cosmetically elegant, and easy to layer,” explains board-certified